XML 58 R46.htm IDEA: XBRL DOCUMENT v3.6.0.2
Investments (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 28, 2017
Feb. 29, 2016
May 31, 2016
Mar. 19, 2015
Investments (Details) [Line Items]        
Investments $ 27.1 $ 25.7 $ 26.2  
Proceeds from the sale of investments 0.0 3.3    
Income from equity method investments 4.9 3.0    
Make Believe Ideas Limited (MBI)        
Investments (Details) [Line Items]        
Percentage of interests acquired       48.50%
Equity method investment 8.0 7.8 8.0  
Children's Book Publishing and Distribution        
Investments (Details) [Line Items]        
Equity method investment $ 19.1 17.9 18.1  
Equity method ownership percentage 26.20%      
Other Investments        
Investments (Details) [Line Items]        
Investments $ 0.0 $ 0.0 $ 0.1